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dc.contributor.authorJeantelot, Gabriel
dc.contributor.authorQureshi, Muhammad
dc.contributor.authorHarb, Moussab
dc.contributor.authorOuld-Chikh, Samy
dc.contributor.authorAnjum, Dalaver H.
dc.contributor.authorAbou-Hamad, Edy
dc.contributor.authorAguilar-Tapia, Antonio
dc.contributor.authorHazemann, Jean-Louis
dc.contributor.authorTakanabe, Kazuhiro
dc.contributor.authorBasset, Jean-Marie
dc.date.accessioned2019-11-18T08:43:26Z
dc.date.available2019-11-18T08:43:26Z
dc.date.issued2019-11-02
dc.identifier.citationJeantelot, G., Qureshi, M., Harb, M., Ould-Chikh, S., Anjum, D. H., Abou-Hamad, E., … Basset, J.-M. (2019). TiO2-supported Pt single atoms by surface organometallic chemistry for photocatalytic hydrogen evolution. Physical Chemistry Chemical Physics. doi:10.1039/c9cp04470a
dc.identifier.doi10.1039/c9cp04470a
dc.identifier.urihttp://hdl.handle.net/10754/660086
dc.description.abstractA platinum complex, (CH3)2Pt(COD), is grafted via surface organometallic chemistry (SOMC) on morphology-controlled anatase TiO2 to generate single, isolated Pt atoms on TiO2 nano-platelets. The resulting material is characterized by FT-IR, high resolution scanning transmission electron microscopy (HRSTEM), NMR, and XAS, and then used to perform photocatalytic water splitting. The photocatalyst with SOMC-grafted Pt shows superior performance in photocatalytic hydrogen evolution and strongly suppresses the backwards reaction of H2 and O2 forming H2O under dark conditions, compared to the photocatalyst prepared by impregnation at the same Pt loading. However, single Pt atoms on this surface also rapidly coalesce into nanoparticles under photocatalytic conditions. It is also found that adsorption of CO gas at room temperature also triggers the aggregation of Pt single atoms into nanoparticles. A detailed mechanism is investigated for the mobility of Pt in the formation of its carbonyls using density functional theory (DFT) calculations.
dc.description.sponsorshipThis work was supported by the King Abdullah University of Science and Technology (KAUST). We warmly acknowledge the help of KAUST Core labs, and the Supercomputing Laboratory at KAUST for the CPU time attributed to this research work. The FAME-UHD project is financially supported by the French “large loan” EquipEx (EcoX, ANR-10-EQPX-27-01), the CEA-CNRS CRG consortium and the INSU CNRS institute.
dc.publisherRoyal Society of Chemistry (RSC)
dc.relation.urlhttp://xlink.rsc.org/?DOI=C9CP04470A
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited,in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
dc.titleTiO2-supported Pt single atoms by surface organometallic chemistry for photocatalytic hydrogen evolution.
dc.typeArticle
dc.contributor.departmentCatalysis for Energy Conversion (CatEC)
dc.contributor.departmentChemical Science Program
dc.contributor.departmentElectron Microscopy
dc.contributor.departmentImaging and Characterization Core Lab
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentKaust Catalysis Center (KCC), Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
dc.contributor.departmentNMR
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalPhysical chemistry chemical physics : PCCP
dc.rights.embargodate2020-11-02
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionInstitut Néel, UPR2940 CNRS, University of Grenoble Alpes, F-38000 Grenoble, France.
kaust.personJeantelot, Gabriel
kaust.personQureshi, Muhammad
kaust.personHarb, Moussab
kaust.personOuld-Chikh, Samy
kaust.personAnjum, Dalaver H.
kaust.personAbou-Hamad, Edy
kaust.personTakanabe, Kazuhiro
kaust.personBasset, Jean-Marie
refterms.dateFOA2019-11-18T08:43:57Z
kaust.acknowledged.supportUnitSupercomputing Laboratory at KAUST


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